/* ==========================================================================
   Prospero's Books - Main Stylesheet (Vanilla CSS)
   ========================================================================== */

/* Design Tokens & Core Variables */
:root {
  /* Color System - Warm Parchment / Editorial Theme */
  --bg-color: #faf6f0;
  --text-color: #1a1a1a;
  --text-secondary: #5a5752;
  --accent-color: #8c3227; /* Rich Brick Red */
  --accent-hover: #b03d30;
  --border-color: #e3ded6;
  --card-bg: #ffffff;
  --focus-ring: #8c3227;

  /* Typography */
  --font-serif-header: Georgia, "Times New Roman", serif;
  --font-serif-body: Garamond, Georgia, "Times New Roman", serif;
  --font-sans-ui: "Arial Narrow", "Avenir Next Condensed", "Segoe UI", sans-serif;

  /* Spacing & Layout */
  --content-width: 700px;
  --layout-width: 1000px;
  --transition-smooth: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Dark Mode Overrides */
@media (prefers-color-scheme: dark) {
  :root {
    --bg-color: #141311;
    --text-color: #e8e3da;
    --text-secondary: #a39e95;
    --accent-color: #d15a4b; /* Soft Terracotta */
    --accent-hover: #e37667;
    --border-color: #2e2a25;
    --card-bg: #1c1a17;
    --focus-ring: #d15a4b;
  }
}

/* Reset & Base Styles */
*, *::before, *::after {
  box-sizing: border-box;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  padding: 0;
  background-color: var(--bg-color);
  color: var(--text-color);
  font-family: var(--font-serif-body);
  line-height: 1.625;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

/* Typography elements */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-serif-header);
  color: var(--text-color);
  line-height: 1.25;
  margin-block-start: 1.8em;
  margin-block-end: 0.6em;
  font-weight: 600;
}

h1 { font-size: 2.5rem; }
h2 { font-size: 1.875rem; }
h3 { font-size: 1.375rem; }

p {
  margin-block-start: 0;
  margin-block-end: 1.25em;
}

a {
  color: var(--accent-color);
  text-decoration: none;
  transition: color var(--transition-smooth);
}

a:hover {
  color: var(--accent-hover);
}

a:focus-visible {
  outline: 2px solid var(--focus-ring);
  outline-offset: 4px;
}

/* Layout Utilities */
.header-container,
.site-main,
.footer-container {
  width: 100%;
  max-width: var(--layout-width);
  margin-inline: auto;
  padding-inline: 1.5rem;
}

/* Header & Navigation */
.site-header {
  border-block-end: 1px solid var(--border-color);
  padding-block: 2rem;
  background-color: var(--bg-color);
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(10px);
  background-color: rgba(250, 246, 240, 0.9);
}

@media (prefers-color-scheme: dark) {
  .site-header {
    background-color: rgba(20, 19, 17, 0.9);
  }
}

.header-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1.5rem;
}

.site-logo {
  display: flex;
  flex-direction: column;
  color: var(--text-color);
}

.site-logo:hover {
  color: var(--accent-color);
}

.site-logo-text {
  font-family: var(--font-serif-header);
  font-size: 1.8rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.1;
}

.site-tagline {
  font-family: var(--font-sans-ui);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--text-secondary);
  margin-top: 0.25rem;
}

.site-nav {
  display: flex;
}

.nav-list {
  display: flex;
  list-style: none;
  margin: 0;
  padding: 0;
  gap: 1.5rem;
}

.nav-link {
  font-family: var(--font-sans-ui);
  font-size: 0.875rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-secondary);
  padding: 0.5rem 0;
  position: relative;
  min-height: 48px; /* Tappable height on mobile */
  display: inline-flex;
  align-items: center;
}

.nav-link:hover,
.nav-link.active {
  color: var(--accent-color);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background-color: var(--accent-color);
  transform: scaleX(0);
  transition: transform var(--transition-smooth);
}

.nav-link.active::after,
.nav-link:hover::after {
  transform: scaleX(1);
}

/* Main Content Area */
.site-main {
  padding-block: 4rem;
  min-height: 60vh;
}

/* Articles and Pages */
.entry {
  max-width: var(--content-width);
  margin-inline: auto;
}

.entry-header {
  margin-block-end: 2.5rem;
  text-align: center;
}

.entry-meta {
  font-family: var(--font-sans-ui);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-secondary);
  margin-block-end: 1rem;
}

.meta-sep {
  margin-inline: 0.5rem;
}

.entry-title {
  margin-top: 0;
  font-size: 2.8rem;
  line-height: 1.15;
  letter-spacing: -0.01em;
}

.entry-subtitle {
  font-family: var(--font-serif-body);
  font-style: italic;
  font-size: 1.25rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin-inline: auto;
  line-height: 1.4;
  margin-top: 1rem;
}

/* Editorial Drop Cap on first letter */
.entry-content > p:first-of-type::first-letter {
  font-family: var(--font-serif-header);
  font-size: 4.5rem;
  float: left;
  line-height: 0.8;
  margin-top: 0.12em;
  margin-right: 0.15em;
  color: var(--accent-color);
  font-weight: 700;
}

.entry-content p {
  font-size: 1.125rem;
  margin-block-end: 1.5em;
}

.entry-content ul,
.entry-content ol {
  margin-block-end: 1.5em;
  padding-inline-start: 1.5rem;
}

.entry-content li {
  margin-block-end: 0.5em;
  font-size: 1.125rem;
}

/* Featured Image Styling */
.entry-featured-image-container {
  margin-block: 3rem;
  text-align: center;
  position: relative;
}

.entry-featured-image {
  max-width: 100%;
  height: auto;
  border-radius: 4px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
  border: 1px solid var(--border-color);
}

@media (prefers-color-scheme: dark) {
  .entry-featured-image {
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
  }
}

/* Homepage Styles */
.homepage-container {
  display: flex;
  flex-direction: column;
  gap: 4rem;
}

/* Featured Essay teaser on Homepage */
.featured-essay-section {
  max-width: var(--content-width);
  margin-inline: auto;
  width: 100%;
  margin-block-start: 2rem;
}

.featured-divider {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  margin-block-end: 2rem;
}

.divider-line {
  flex-grow: 1;
  height: 1px;
  background-color: var(--border-color);
}

.featured-section-title {
  font-family: var(--font-sans-ui);
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--text-secondary);
  margin: 0;
  white-space: nowrap;
}

.featured-essay-card {
  background-color: var(--card-bg);
  border: 1px solid var(--border-color);
  padding: 2.5rem;
  border-radius: 8px;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.02);
  transition: transform var(--transition-smooth), box-shadow var(--transition-smooth);
}

.featured-essay-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.04);
}

@media (prefers-color-scheme: dark) {
  .featured-essay-card {
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.2);
  }
  .featured-essay-card:hover {
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
  }
}

.featured-card-meta {
  font-family: var(--font-sans-ui);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.10em;
  color: var(--text-secondary);
  margin-block-end: 0.75rem;
}

.featured-card-title {
  margin: 0 0 1rem 0;
  font-size: 1.75rem;
}

.featured-card-title a {
  color: var(--text-color);
}

.featured-card-title a:hover {
  color: var(--accent-color);
}

.featured-card-summary {
  font-size: 1.05rem;
  color: var(--text-secondary);
  margin-block-end: 1.5rem;
}

.featured-card-link,
.read-more-link {
  font-family: var(--font-sans-ui);
  font-size: 0.875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  display: inline-flex;
  align-items: center;
}

/* Section Catalog / List Feed */
.section-container {
  max-width: var(--content-width);
  margin-inline: auto;
}

.section-header {
  border-block-end: 1px solid var(--border-color);
  padding-block-end: 2rem;
  margin-block-end: 3rem;
}

.section-title {
  margin-top: 0;
  font-size: 2.5rem;
}

.section-intro {
  font-size: 1.2rem;
  color: var(--text-secondary);
  font-style: italic;
}

.journal-feed {
  display: flex;
  flex-direction: column;
  gap: 3rem;
}

.feed-item {
  border-block-end: 1px solid var(--border-color);
  padding-block-end: 3rem;
}

.feed-item:last-of-type {
  border-block-end: none;
}

.feed-item-meta {
  font-family: var(--font-sans-ui);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-secondary);
  margin-block-end: 0.5rem;
}

.feed-item-title {
  margin: 0 0 1rem 0;
  font-size: 2rem;
}

.feed-item-link {
  color: var(--text-color);
}

.feed-item-link:hover {
  color: var(--accent-color);
}

.feed-item-summary {
  font-size: 1.1rem;
  color: var(--text-secondary);
  margin-block-end: 1.5rem;
}

/* Form Styling (Accessible, Brand-Consistent, 48px Tappable) */
.contact-form {
  margin-block-start: 2rem;
}

.form-group {
  margin-block-end: 1.75rem;
  display: flex;
  flex-direction: column;
}

.form-group label {
  font-family: var(--font-sans-ui);
  font-size: 0.875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-color);
  margin-block-end: 0.5rem;
  display: inline-block;
}

.form-group input,
.form-group textarea {
  font-family: var(--font-serif-body);
  font-size: 1.05rem;
  padding: 0.85rem 1rem;
  background-color: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 4px;
  color: var(--text-color);
  min-height: 48px; /* Mobile accessibility tap targets */
  transition: border-color var(--transition-smooth), box-shadow var(--transition-smooth);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--accent-color);
  box-shadow: 0 0 0 3px rgba(140, 50, 39, 0.15);
}

@media (prefers-color-scheme: dark) {
  .form-group input:focus,
  .form-group textarea:focus {
    box-shadow: 0 0 0 3px rgba(209, 90, 75, 0.25);
  }
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--text-secondary);
  opacity: 0.5;
}

.submit-button {
  font-family: var(--font-sans-ui);
  font-size: 0.875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: #ffffff;
  background-color: var(--accent-color);
  border: none;
  border-radius: 4px;
  padding: 1rem 2rem;
  cursor: pointer;
  min-height: 48px;
  transition: background-color var(--transition-smooth), transform var(--transition-smooth);
  box-shadow: 0 2px 6px rgba(140, 50, 39, 0.15);
  width: fit-content;
}

.submit-button:hover {
  background-color: var(--accent-hover);
  transform: translateY(-1px);
}

.submit-button:active {
  transform: translateY(0);
}

.submit-button:focus-visible {
  outline: 2px solid var(--focus-ring);
  outline-offset: 4px;
}

/* Footer Styling */
.site-footer {
  border-block-start: 1px solid var(--border-color);
  padding-block: 4rem;
  background-color: var(--bg-color);
  text-align: center;
  margin-block-start: 4rem;
}

.footer-copyright {
  font-family: var(--font-sans-ui);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-secondary);
  margin: 0;
}

.footer-tagline {
  font-family: var(--font-serif-header);
  font-style: italic;
  font-size: 1.1rem;
  color: var(--text-secondary);
  margin-top: 1rem;
  margin-bottom: 0;
}

/* Responsive adjustments */
@media (max-width: 768px) {
  h1 { font-size: 2rem; }
  h2 { font-size: 1.5rem; }
  .entry-title { font-size: 2.2rem; }
  .site-header { padding-block: 1.5rem; }
  .header-container {
    flex-direction: column;
    align-items: center;
    gap: 1rem;
  }
  .nav-list {
    gap: 1rem;
  }
  .site-main {
    padding-block: 2rem;
  }
  .featured-essay-card {
    padding: 1.5rem;
  }
}